[Dephect]

The drivetrain lash that plagues the speed 6 is well known and as such, most have decided to upgrade motor mounts and differential mounts for one reason or another. This reduction in the drivetrain lash makes putting power to the road more reliable, but would that translate to actual number gains in power to the wheels.

stock- 274bhp or horsepower at the crank.
anywhere between 220-230whp or horsepower to the wheels.

So if we are losing 50hp in the drivetrain, we could see slight improvements in what we are losing just by effectively replacing the sloppy mounts. This of course is my theory, but has anyone come across numbers that show the effect? Or would the gains simple be felt on the "seat of the pants" dyno? I know 60' and 1/4 mile times would slightly improve but I'm looking numbers.

 

[Eminent.Six]

I see the point you're getting at, however, I don't think it would effect the amount of actual power being transmitted through the drive train.

If anything, it would only effect the amount of time the power would take to get to wheels. And even if we could measure that very small delay, I think it would prove to be irrelevant.

When the motor twists on the motor mounts, the only thing that would change is the time it takes for the mounts to reach their peak tolerance level. For example, it may take 50 ms for the stock motor mounts to reach their peak tolerance level, while it only takes 25 ms for aftermarket mounts to do the same due to more dense material.

 

[p057]

look into reducing weight in the flywheel and the balance shaft. they will net the most reduction in parasitic drivetrain losses.


along with lighter wheels and tires.

 

[jeb8699]

on the flywheel note if you go lighter would you have a better chanch of warping it over a oe replacement?

 

[The Great NY]

mounts do not have any influence on gaining power. what mounts do is translate what power is there to the ground faster and more effeciently. it helps increase power response by reducing the engine movement.

when you hit the throttle, the engine torques away from the direction the crank is spinning. this time it takes to stop moving is also compounded by the time it takes the drivetrain part to stop moving. and it adds up. with stiffer mounts the power is transfered faster due to less engine movement.

you will feel the difference in response. another thing mounts do is keep all the parts geometrical and help from parts seeing weird angles on acceleration like axles and such. this inturn reduces the chance of breaking or damaging drivetrain parts.

 

[IHeartGroceries]

Justin, you keep swooping in with your infinite wisdom before I can a word in!!! Lol!!
I agree, though.

 

[The Great NY]

Justin, you keep swooping in with your infinite wisdom before I can a word in!!! Lol!!
I agree, though.

haha, thanks man. i browse all forums via the new post button. if i come across something i can help with i'll post. if not, i dont post or refer them to someone who can.

my wisdom is far from infinite, haha.

 

[SJP0tato]

look into reducing weight in the flywheel and the balance shaft. they will net the most reduction in parasitic drivetrain losses.

I don't think that's true as parasitic loss is the power lost through friction. Gears churning through oil, various contact surfaces transferring torque between one another generates friction which is where the loss occurs.

Lighter components will make for less inertia to fight against during acceleration which will allow slightly faster accel, but overall parasitic loss should be about equal with their heavier counterparts.